1voucher sells DUD VOUCHERS AND DON'T GIVE A REFUND

I bought a voucher from them for R4000 which was a dud about 15 days ago. They initially responded to emails (by robot) and made telephonic promises of refund, but now they don't respond at all and telephone queries get cut off. Their 1voucher.com has been deleted and now have a .co.za site. It is impossible to get any reaction from them. BUY A 1voucher AT YOUR PERIL.